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  <title>script.aculo.us Drag and drop functional test file</title>
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  <script src="../../lib/prototype.js" type="text/javascript"></script>
  <script src="../../src/scriptaculous.js" type="text/javascript"></script>
  <script src="../../src/unittest.js" type="text/javascript"></script>
  <style type="text/css" media="screen">
    div.box { background: green; width:100px; height:100px }
    div.box-container { background: yellow; width:200px; height:200px }
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<h1>script.aculo.us Drag and drop functional test file</h1>

<h2>Draggables/Droppables</h2>

<div id="box-normal" class="box">
  Normal box
</div>

<div id="box-grid-numeric" class="box">
  snap: 25
</div>

<div id="box-grid-array" class="box">
  snap: [5,25]
</div>

<div id="box-grid-procedural" class="box">
  snap: procedural (e.g. constrain to box)
</div>

<div class="box-container">
  <div id="box-grid-procedural-gets-draggable" class="box">
    snap: procedural (e.g. constrain to parent element)
  </div>
</div>

<script type="text/javascript" language="javascript" charset="utf-8">
// <![CDATA[
  new Draggable('box-normal',{snap:false,revert:true});
  new Draggable('box-grid-numeric',{snap:25,revert:true});
  new Draggable('box-grid-array',{snap:[5,25],revert:true});
  new Draggable('box-grid-procedural',{
    snap: function(x,y) {
      return[
        x<100 ? (x > 0 ? x : 0 ) : 100,
        y<50 ? (y > 0 ? y : 0) : 50];
    },
    revert:true
  });
  new Draggable('box-grid-procedural-gets-draggable',{
    snap: function(x,y,draggable) {
      function constrain(n, lower, upper) {
        if (n > upper) return upper;
        else if (n < lower) return lower;
        else return n;
      }
     
      element_dimensions = Element.getDimensions(draggable.element);
      parent_dimensions = Element.getDimensions(draggable.element.parentNode);
      return[
        constrain(x, 0, parent_dimensions.width - element_dimensions.width),
        constrain(y, 0, parent_dimensions.height - element_dimensions.height)];
    },
    revert:true
  });
// ]]>
</script>


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